1.Make sure you're subscribed to at least one RSS feed where you had selected the "Show the article summary instead..." option when setting up the feed. 2. In the folder pane, select the feed. 3. Select an article in the thread pane. See the complete page with the above link.

this wfm with that feed (trunk). if View->Feed Message Body as is set to Default Format *and* you don't have multiple feeds per folder (bug 550800), and it's not a standalone window (bug 728563) please resubmit, otherwise dupe..